Abstract: The invention relates to the technical field of solar cells, in particular to a three-dimensional framework silicon/perovskite tandem solar cell and its preparation method. The three-dimensional framework silicon/perovskite tandem solar cell comprises a formal structure or a trans structure; a p-type amorphous silicon layer, a top electrode light-transmitting layer, an n-type transmission layer, a perovskite thin film, a p-type transmission layer, a buffer layer and a transparent electrode which are sequentially laminated on a substrate from bottom to top; when it is in a trans structure, it comprises a p-type silicon nanowire, an i-type intrinsic amorphous silicon layer, an n-type amorphous silicon layer, a top electrode light-transmitting layer, a p-type transmission layer, a perovskite thin film. The present invention can improve the absorption efficiency of the cell for incident light, broaden the absorption spectrum, and further improve the photoelectric conversion efficiency of the solar cell.

Abstract: An automated three-dimensional refrigerated warehouse for a meat industry is provided. A refrigerated warehouse body is provided with two groups of chain wheels, a chain is sleeved on each group of chain wheels, and a plurality of mounting blocks are uniformly mounted on the chain. The mounting blocks are connected to suspension rods, a supporting table is connected between bottom ends of the suspension rods, an opening is provided in a middle of the supporting table, and a loading cart is placed on the supporting table. The refrigerated warehouse body is connected to two supporting plates, a first electric push rod is arranged above each of the two supporting plates, and top ends of the two first electric push rods are provided with mounting plates. Top ends of the two mounting plates are provided with a horizontal second electric push rod and a horizontal third electric push rod respectively.

Abstract: An automated three-dimensional refrigerated warehouse for a meat industry is provided. A refrigerated warehouse body is provided with two groups of chain wheels, a chain is sleeved on each group of chain wheels, and a plurality of mounting blocks are uniformly mounted on the chain. The mounting blocks are connected to suspension rods, a supporting table is connected between bottom ends of the suspension rods, an opening is provided in a middle of the supporting table, and a loading cart is placed on the supporting table. The refrigerated warehouse body is connected to two supporting plates, a first electric push rod is arranged above each of the two supporting plates, and top ends of the two first electric push rods are provided with mounting plates. Top ends of the two mounting plates are provided with a horizontal second electric push rod and a horizontal third electric push rod respectively.